3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A {} class B extends A {} interface C {} class D implements C {} var_dump(is_subclass_of('B','A')); var_dump(is_subclass_of('A','A')); var_dump(is_subclass_of('D','C')); var_dump(is_a('B','A')); var_dump(is_a('A','A')); var_dump(is_a('D','C'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NKMFu
function name:  (null)
number of ops:  44
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   DECLARE_CLASS                                            'd'
    8     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'is_subclass_of'
          3        SEND_VAL                                                 'B'
          4        SEND_VAL                                                 'A'
          5        DO_ICALL                                         $0      
          6        SEND_VAR                                                 $0
          7        DO_ICALL                                                 
    9     8        INIT_FCALL                                               'var_dump'
          9        INIT_FCALL                                               'is_subclass_of'
         10        SEND_VAL                                                 'A'
         11        SEND_VAL                                                 'A'
         12        DO_ICALL                                         $2      
         13        SEND_VAR                                                 $2
         14        DO_ICALL                                                 
   10    15        INIT_FCALL                                               'var_dump'
         16        INIT_FCALL                                               'is_subclass_of'
         17        SEND_VAL                                                 'D'
         18        SEND_VAL                                                 'C'
         19        DO_ICALL                                         $4      
         20        SEND_VAR                                                 $4
         21        DO_ICALL                                                 
   12    22        INIT_FCALL                                               'var_dump'
         23        INIT_FCALL                                               'is_a'
         24        SEND_VAL                                                 'B'
         25        SEND_VAL                                                 'A'
         26        DO_ICALL                                         $6      
         27        SEND_VAR                                                 $6
         28        DO_ICALL                                                 
   13    29        INIT_FCALL                                               'var_dump'
         30        INIT_FCALL                                               'is_a'
         31        SEND_VAL                                                 'A'
         32        SEND_VAL                                                 'A'
         33        DO_ICALL                                         $8      
         34        SEND_VAR                                                 $8
         35        DO_ICALL                                                 
   14    36        INIT_FCALL                                               'var_dump'
         37        INIT_FCALL                                               'is_a'
         38        SEND_VAL                                                 'D'
         39        SEND_VAL                                                 'C'
         40        DO_ICALL                                         $10     
         41        SEND_VAR                                                 $10
         42        DO_ICALL                                                 
         43      > RETURN                                                   1

Class A: [no user functions]
Class B: [no user functions]
Class C: [no user functions]
Class D: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
185.42 ms | 1396 KiB | 19 Q